/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.google.code.twiddling.core.clp.handler;

import com.google.code.twiddling.core.clp.ArgumentDescriptor;
import com.google.code.twiddling.core.clp.CLParsingException;
import com.google.code.twiddling.core.clp.Descriptor;
import com.google.code.twiddling.core.clp.Handler;
import com.google.code.twiddling.core.clp.OptionDescriptor;
import com.google.code.twiddling.core.clp.Parameters;
import com.google.code.twiddling.core.clp.setter.Setter;

public class BooleanHandler extends Handler<Boolean>
{
    public BooleanHandler(final Descriptor desc, final Setter<? super Boolean> setter) {
        super(desc, setter);
    }

    @Override
    public int handle(final Parameters params) throws CLParsingException {
        
        if (descriptor instanceof ArgumentDescriptor) {
            String token = params.get(0);
            boolean value = Boolean.parseBoolean(token);
            setter.set(value);
            return 1;
    	} 
        else if (descriptor instanceof OptionDescriptor && isKeyValuePair) {
        	String token = params.get(0);
        	token = token.substring(token.indexOf('=') + 1, token.length());
        	boolean value = Boolean.parseBoolean(token);
        	setter.set(value);
        	return 1;
        }
        else {
            if (((OptionDescriptor)descriptor).isArgumentRequired()) {
                String token = params.get(0);
                boolean value = Boolean.parseBoolean(token);
                setter.set(value);
                return 1;
            }
            else {
                setter.set(true);
                return 0;
            }
        }
    }

    @Override
    public String getDefaultToken() {
        return null;
    }
}
